Cosmos is a network created with the purpose of connecting different blockchains together. It's a decentralized ecosystem of blockchains that scale and connect to each other. The native token of Cosmos is called Atom. The idea for Cosmos came about in 2014 from Jae Kwon. The Cosmos network is made up of two key layers. The first layer is called Tendermint BFT (Byzantine Fault Tolerant) It solves the problem of creating a blockchain from scratch by combining the networking and consensus layers into an engine.The second layer is the application layer. The Cosmos Software Developer Kit (SDK) is used by developers to create their own blockchain applications.